Device for removing pulleys from shafts



Dec. 4, 192,3.

1,476,128 w. s. wEsToN DEVICE FOR REMOVING PULLEYS FROM SHAFTS I s Sheets-shem 'z Filed Jan. 16. 1922 m III ,If'a 9 2/ waw,

Dec. 4 1923.

W. S. WESTON DEVICEI FOR REMOVING PULLEYS FROM SI'IAFTS Filed Jan. 16. 1922 3 Sheets-Sheet 5 Patented Dec., 4, 1923.'

terena WILLIAM s. wns'roiv,v or' conui'aere, souirrroenomim.

DEVICEFOR REMOVING EULLEYS SHAFT. l

Application filed January 16,l 1922. Serial No. 529,79 5. i

To aZZ whom z't may concem:

Be it known that I, `WILLIAMv S.V Wns'roN, a citizen of the United States, and residing at Columbia, Richland County, State of South Carolina, have invented Vcertain new and useful Improvernents in Devices for Removing Pulleys from Shafts, of which the following is a specification.

The present invention relates to devices for removing pulleys from shaft-s, cranlr pins from cranks, and in fact for securlng relative movement between a shaft and any article or device which is frictionallyl hel on said shaft.

The object of the invention is to provide a device of this character which is of simple construction and light in weight, while at the same time is powerful in action and can overcome great frictional force opposin'g the movement of a pulley, for instance,` along a cylindrical shaft on' which it is tightlyV fitted. Another object of the invention is to provide such a device which may be placed on a shaft at any point along its length to move or shift a pulley mountod thereon, the device not being necessarily vput on the shaft over the end. In certain cases itl is desire'd to eXert a pulling force upon a wheel or pulley to move it along a shaft where it is impossible to position the device in close proxiinity to the pulley to be inoved, A device formed in accordance with one form of thepresent invention is adapted to be placed on the shaft at a distance from the pulley and `to be operatively connected thereto by means of rods so that the pulling may be conveniently efie'cted when the device is necessa'rily located at some distance from the object to be shifted.

The invention may be made in various forms and one embodiment is illustrated in the accompanying drawings7 in which:

Figure 1 is a side elevation, partly broken away, of the inventon as applied to a shaft and in position to move the hub of a pulley longitudinally along the shaft;

Figure 2 is a section on line 2-2- of Figure 1; V V v Figure 3 is a side elevation of the collar which comprises one portionof the device;

Figure 4 is a section through one form of tapered bushing used;

Figures 5 and 6 are side and end elevations respectively of a second form of tapered bushing;

Figure 7 is an edge viewfof a modified form of collarp;

Figure 8 is a longitudinal.section-'through' the' same; f Figure 9is an'elevati-on of the same lshow-` ing its working face ;V Figure 10 is a side elevati'on of portion of a shaft showing the device in positionl to exert a pulling force on a member mounted I on the shaft, and

Figure 11 an end-'elevationof the same as seen from the right (Figl).

A shaft is indicated at 10' and the hub of a Wheel or pulley whichris frictionally se'- cured to the shaft` is indicated'at 11. Restiifg against one face of the hub of the pulley is a protecting plate or washer 12 lwhich insures that this face of the pulley hub is not injured or bruised during the shifting operation. Supported upon shaft 10'adjacent washer 12' is a bushing 13lwhich is longitudinally' split' at 14 so that it'may be expanded or contracted. The outer surface of this bushing is frustro-conical, the bushing tapering in axial cross section'toward the `washer 12.v Preferably a sheet of paper,

cloth or similar material 15 is interposed between the bushing and the shaft. The outer, frustro-conical surface of the bushng is lubricated and fits within a correspondingly tapered central aperture in thel collar '16. The face of the collar 16-which lies adjacent vwasher 12 has two inclined grooves 17 thereon` and these' grooves receive wedges V16, which Vbear against both the col1ar`16 and the washer 12. v I

Downward movement of the wedgesyof course will cause a preliminary movement 'of the collar 16 away from the hub but this movement mmediately causes bushing 13 to grip shaft 10, so that this bushinfg serves as an abutment preventing further movement i of collar 16 along the shaft. `-Further downward force exerted on the wedges 18 will overcome the frictional resistance to relative movement between the hub 11 and shaft 10 and the hub will move along the shaft. When the wedges have been driven down as far as possible, they are removed, thecollar 16 advanced toward the hub and 'the bushing 13 also advanced to have a snug fit with the collar, and the wedges again driven down to move the hub a further distance along the shaft. This operation may be repeated as many times as are necessary to obtain the into Twhich the wedges are driven.

desired movement of the hub, and the mechanical advantage of the Vdevice is such that it is able to overc'ome very great frictional resistance. Instead of advancing` the bushing 13 after each downward movement of` the wedges a shim, or shirns,'may be placed, in addition to Vthe washer 12, betweenthe collar and the hub 11 to `narrowthe gap This saves considerable time in operation.

vThe device illustrated in Figures 1, 2.

3y and 4 is adapted to be placed over theI` end of theshaft, the collar 13 being one integral piece. Vlt is sometimes impossible,

between the two halves is not straight buteach half has a shoulder with a transverse face which abuts against a similar face onV the opposite half to prevent vrelative longitudinal movement between the. two halves of the bushing in the operation of the device, the shoulders of each half facing in opposite directions..

As can be seen in Figure 6 the adjacent edges of the-two halves overlap and there is ample clearance at 14:' to permit a limited radial movement of the bushing. rThe collar illustrated in Figures 7, v8 and 9 comprises two portions 18 and 19 hinged together by a pin 20. A second pin 21 is provided for looking the opposite ends of the two portions together-'after the collar has been` placed around the shaft. Inclined faces 22 constitute bearing surfaces for the wedges and the operation of the device, when once it is placed in position, is exactlythe same as in the first described form of the invention. v

The collar 18 is provided with holes 23 which arediametrically opposed to Veach other and are equidistantly spaced from the center. These holes or apertures are adaptcd to receive rods or bars such as il- 'lustrated at 24, which rods or bars majT connect a member in advance of the collar, such as the U shaped member 25, to a pulley or other object at some distance from the pulling device` when it is not possible to position this device adjacent the object to be moved. `When these rods are being used it is possible to exert a pulling force on an object inounted on the shaft at some distance from the collar, such as ring 26, shown in Figure 10.

To those slzilled in the art it will be apparent that still other niodifications of the invention might be made and that the invention is not limited in its scope to the de- V object to be moved. i

device of the class described inincrease vices described. The many advantages of* ing, in combination, a collar, means for engaging 'a shaft to prevent movement of the collar in oneV direction, and means to cooperate with the collar and movable transversely of the shaft, to exer:J equal and oppositely directed forces on the 2. A cluding"`in 'coinbinatiom a. collar, a Vwedge member for engaging a shaft tojprevent collar and the I movement of the collar in one direction, 7

and 'means adapted'tobe inserted between the collar and the object to'l be moved, to exert equal and oppositely direct-ed forces on the collar and said object. v V

3. A device of the class described including in combination, a collar having an apertiireto receive a shaft, the wall of the aperture being inclined to its axis, a wedge member to engage the wall of4 the aperture Vand the shaft to prevent movement' of the collar in one direction, and means to cooperate with the collar and movable trans-l V versely of the shaft to exert equal and oppositely directed forces on the collar 'and ob- 4 ject to be moved. V v V Il. A device of the class described including in combination, a collar having a tapering apertui'e to receive a shaft, means adapted to enter said aperture in addition to the shaft, to engage the eoilar and shaft to prevent movement of the'collar in one direction, and wedge means to cooperate with the collar and movable transversely of the shaft, to exert equal and oppositely directed forces on the collar and the object to be nioved.

5. A device of the class described including` in combination, a collar having a tapering aperture to'receive a shaft, a wedgeV adapt-ed to enter said aperture in LadditionL to the shaft to engage the. collar and shaft to `prevent movement of the'collar in one dii'ection` and wedge means to cooperate with the collar and movable transversely of'the shaft, to exert equal and oppositely directed forces on the collar and the object tofibe nioved.

6. A device of the class described, including in combination, a collar having a taperv the collar and movable transversely of theV ioo izoV

ina/6,128

. ed forces on the collar and the object to be moved.

7. A device of the class described, including in combination, a collar having a tapering openingtherethrough of circular 'cross section to receive a circular shaft, a sleeve bushing having a correspondingly tapering outer surface and a cylindrical inner surface, adapted to enter the tapering opening in the collar and to engage the shaft to prevent movement of the collar in' one direction, said bushingv being longitudinally split so as to be contractible and expandible, and wedge means to cooperate with the collar and movable transversely of the shaft, to exert equal and oppositely directed forces on the collar and the object to be moved.

8. A device of the class described including in combination, a collar adapted to fit around a shaft and comprising two separate portions adapted to be rigidly secured together, means for engaging the shaft, to prevent movement of the collar in one direction, and wedge means to cooperate with the collar and movable transversely of the shaft, to exert equal and oppositely directed forces on the collar and the object to be moved.

9. A device of the class described, including in combination, a collar having an aperture to receive a. shaft, openable to receive the shaft and closable to completely encircle the shaft, means for engaging the shaft to prevent movement of the collar in one direction, and wedge means to cooperate with the collar and movable transversely of the shaft, to exert equal and oppositely directed forces on the collar and the object to be moved.

10. A device of the class described including in combination, a collar adapted to fit around a shaft and comprising two portions hinged together so as to be removable from the shaft, means for engaging the shaft to prevent movement of the collar in one direction, and wedge means to cooperate with the collar and movable transversely of the shaft, to exert equal and oppositely directed forces on the collar and the object to be moved.

11. A device of the class described including in combination, a collar adapted to fit around a shaft and comprising two portions h-inged together so as to be removable from the shaft, means to lock said portions rigidly` together, and means for'engaging the shaft to prevent movement of the collar in one direction, and wedge means to cooperate with the collar and movable transversely of the shaft, to exert equal and oppositely directed forces on the collar andthe object to be moved. q

12. A device of the class described ncluding in combination, a collar member ladapted to fit around a shaft, a second member adapted to also fit around the shaft adjacent the first member, means forV securing one of said members to the shaft, means insertable between said members to eflect relative movement thereof, and means for connecting one of said members to a distant object mounted on the shaft- 13. A device of the class described including in combination, a collar member adapted to fit around a shaft, a second member adapted to also fit around the shaft adjacent the first member, means for securing one of said members to the shaft, means insertable between said members to effect relative movement thereof, and rods secured to one of said members and extending toward and past the other member for connecting the first member to a distant object mounted on the shaft.

14. A device'of the class described, including in combination, a collar adapted to fit around a shaft, a U shaped member adapted to fit around the shaft adjacent the collar, means for securing the collar to the shaft, means insertable between said collar and member to efi'ectv relative movement thereof, and rods for connecting the U 1 shaped member to a distant object mounted rods for connectng the U shaped member to a distant object mounted on the shaft, said rods passingl through the apertures in the collar.

In testimony whereof I hereunto aflix my signature.

WILLIAM S. WESTON. 

